The victims of the 9/11 terrorist attacks were remembered at a ceremony marking the 10-year anniversary of the tragic events on Sunday.

The names of the 2,977 people killed in the attacks were read during the ceremony, which stopped for a moment of silence at 8:46 a.m. — the time when American Airlines Flight 11 crashed into the North Tower of the World Trade Center a decade ago.

Another moment of silence was observed at 9:03 a.m. — the time when United Airlines Flight 175 struck the South Tower. A third moment of silence was held in Washington at 9:37 a.m. — the moment American Airlines Flight 77 struck the Pentagon and killed 184 people, and another at 10:03 a.m. in Shanksville, Pennsylvania, where passengers stopped the hijacking plot, crashing United Airlines Flight 93 to the ground.

The 9/11 Memorial was also dedicated during Sunday’s ceremony in New York City. The memorial features twin reflecting pools and the largest man-made waterfalls in North America. The pools sit in the footprints of where the Twin Towers once stood. The names of every person who died in the 2001 attacks as well as the six people killed in the World Trade Center bombing in February 1993 are inscribed on bronze panels around the pools. The memorial will open to the general public on Monday.